Seat Belt

Release time:


The protection principle of automobile seatbelt| Automobile safety belt classification and precautions and maintenance|

Seat Belt

一. The origin of the car seat belt

On May 20, 1902, at a motor race in New York City, an engineer who drove an electric car, Walter Becker, and a motorist competed.Becker was a meticulous, cautious man, chained himself and the motorman to the seat with a few straps, just in case.Two people were killed and dozens injured when the electric car hit a steel rail rising from the ground, veered off the road and ploughed into a crowd.However, two racers survived using seat belts.The widespread use of seat belts in cars, however, was 70 years later.

二.  Car seat belts

As early as 100 years ago, carriage seats in Europe and the United States had seat belts to prevent passengers from jumping out of the carriage.In 1922, seatbelts were introduced on racing cars;In 1955, Ford cars in the United States were equipped with seat belts;In 1968, the United States required that seat belts be installed in all forward-facing seats of cars.The Ministry of Public Security also issued a circular in 1992, stipulating that since July 1, 1993, all small buses (including cars, jeeps, vans and minivans) must use seat belts when driving, both the driver and the front seat occupants.

三. Principle and classification of automobile seat belt

Car seatbelts are in the form of airplane seatbelts.Its working principle is: the human body is fixed on the car seat with high strength ribbon, in order to avoid the human body due to strong inertia and thrown out of the car or hit other parts of the car and cause human body damage.Seat belts also protect the occupant in the event of a second or multiple crash in which the vehicle loses balance, overturns, or rolls over.

四. Classification of automobile seat belts

1.Two-point seat belt, also known as seat belt.The two-point seat belt has only two fixed points with the car body or seat structure. The soft belt is hung from both sides of the waist to the abdomen, like a belt, which can prevent the occupant from moving forward or throwing out of the car in a collision.


2. Three-point seatbelt.Is a kind of seat belt to make up for the shortcomings of the two-point seat belt, it adds the shoulder strap on the basis of the two-point seat belt, there is a fixed point on the body near the shoulder, can prevent the passenger body forward, increase the safety of the passenger, is the most common use of seat belt.


3. Seatbelts for cars.By the ribbon, installation and rewinding parts and other components, the ribbon multi-purpose nylon, polyester and other synthetic fiber yarn woven into a width of about 50mm, about 1.5mm thick belt, with enough strength, extension performance, for the ribbon technical performance indicators, countries have clear provisions, to meet the provisions to use.


五. Pre-crashseatbelt.   It is divided into NLR, ALR, ELR, NLR and NLR. Lock seat belt

1. Non-locking seat belt: it means that the occupant can pull the webbing out from the rewinder with a small external force and keep the tightening force under the condition of pulling the webbing out.The safety belt keeping tightening force is based on the premise that the occupant will pull out all the webbing, so it can not be made accurate judgment and protection for some non-emergency situations according to different people.

2. Automatic locking seat belt means that the occupant can pull the ribbon out with a small external force, and stop pulling the ribbon out at any position, the locking mechanism can automatically lock near the stop position, while maintaining the binding force.

3. Emergency locking seat belt: pretightening seat belt is a kind of seat belt developed in recent years.For the comfort of the passengers, the preloading force of the seat belt should not be too large. There is always a certain gap between the seat belt and the human body. When the passengers wear thick clothes, the gap will be larger.In a collision, this clearance will reduce the effective range of action of the seat belt and reduce the effectiveness of the seat belt.The pretensioner is used for the pretensioner. When the collision reaches a certain intensity, the pretensioner is started to drive the lock to retract or retract the retractor to make the seat belt shorten the fixed distance, effectively eliminate the gap and improve the role of the seat belt.


六. Note and maintenance of car seat belt use

1. The seat belt can not be twisted, nor should it be easy to use and clip the belt, or only put the belt on the body without tongue, so that in case of an accident, the seat belt will be difficult to function after the seat belt is used or the seat is no one, the seat belt should be sent to the recovery reel so that the buckle tongue is in a contraction position.If the seat belt has been subjected to a strong straightening load during use, the assembly should be replaced and cannot be used again, even if the damage is not visible.When replacing the seat belt, it should be matched with the original vehicle to avoid compromising its effectiveness.


2. The seat belt should be washed in soapy water, and then washed in clean water. Strong detergents such as oxides and bleaching powder should not be used.After washing, should be in the shade dry, do not insolate in the sun.


3. WenZhou Jeatu Safety systems Co.,Ltd. specializes in the development and production of car seat belts and other series, if necessary, you can contact our company via email, thank you very much.